How are communication cables categorized?

I. How are communication cables categorized? Communication cable is the main component of the wired communication network, the line composed of it has certain advantages, it can be used to transmit telephone, telegraph, television and other communication projects, in these projects, each has a different transmission band and transmission distance. The transmission band ranges from audio to high frequency tens of megahertz or even higher frequencies. Transmission distance from the city to thousands of kilometers. In order to adapt to a variety of different transmission projects, communication cables are divided into various types, generally according to its scope of use is divided into municipal communications, long-distance communications and special-purpose communication cables. In addition, the structure of the cable and laying conditions can also be divided into types of communication cables. According to the structure is divided into symmetrical cable, coaxial cable and fiber optic cable, respectively, as follows: (1) symmetrical cable symmetrical cable varieties are: ① telephone cable; ② wiring cable; ③ bureau cable; ④ high-frequency cables; ⑤ low-frequency cable; ⑥ special cable. (2) coaxial cable coaxial cable varieties are: ① small coaxial trunk cable; ② medium coaxial trunk cable; ③ micro-coaxial cable; ④ large coaxial cable; ⑤ radio frequency cable; ⑥ special cable. (3) fiber optic cable: ① according to the laying and operating conditions can be divided into aerial, direct burial, pipeline and underwater cables. ② According to the combination of cable components can be divided into a single structure of the cable and integrated cable.

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